Frederick george smith



. F. 6. SMITH.

VALVE FOR STEEL MAKING FURNACES 0R MIXERS AND THE LIKE.

APPLICATION FILED NOV-7.1918.

Patented Oct. 28, 1919.

N N N X N w 1111111 II Ru Iv T m m A dam HQ n m m mm Um m N N WW WW wF'RE HER/CK Geo/m5 SMITH NITED STATES PATENT OFFICE.

FREDERICK GEORGE SMITH, OF rURLE sz, ENGLAND, ASSIGNOR or ONE-HALF ToWELLMAN SEAVER AND HEAD LIMITED, or LONDON, ENGLAND.

VALVE FOR, SDTEEL-MAKINGFURNACES on MIXERSAND THE LIKE.

Specification of Letters Patent.

Patented Oct. 28, 1919.

Application filed November 7, 1918. Serial No. 261,450.

To all whom it may concern SMITH, subject of the King of Great Britain,residing at .Mameena, Church Hill, Purle'y, in the county of Surrey,England, have invented new and useful Improvements in Valves forSteel-Making Furnaces or Mixers and the like, of which the following isa specification.

This invention has for its object to provide steel-making furnaces, ormixers, and the like apparatus in which a part of the tructure is usedto afford communication between portions such as between the furnaceport and the port of the regenerator, with a sealing'device which isvery simple and economical in construction and maintenance, not liableto readily get out of or der, and which can be operated to open and toseal the ports with great facility.

According to this invention the trough of the seal which surrounds thelower port contains a second sealing device holding liquid into whichenters a projection surrounding the upper port, the said second sea-lingdevice being provided with mean 7 which will cause itto rise, or to beraised, in the liquid in the said trough when the seal liquid can bewithdrawn.

is made, the said second sealing device descending, or being lowered, inthe said trough to break the seal around the upper port, and rising orbeing raised, in the said liquid to re-make the seal.

The accompanying drawings represents, in vertical section in Figure 1, aconstruction, or arrangement, according to this inventi'on, and Fig. 2shows a modification as hereinafter described, but I do not limit myselfto the precise details illustrated.

Referring to Fig. 1; the trough A, which surrounds the lower port X, isprovided with a tap, a, or the like, by means of which The, secondsealing device consists of a trough-like ring B, or the equivalent,whose upper portion constitutes a trough b for liquid and whose lowerportion 6 is hollow and constitutes an air-space'so that the said ring,or the like, B, will float in, or on, the liquid in the said trough A,and then a projecting ring C, which surrounds the lower end of the upperport structure Y, will enter the liquid in the upper portion 6 of thesaid second. sealing device and the seal will be complete. said secondsealing device B, can be guided in the trough A, by any suitable means.i To Be it known that I, FREDERICK Gnonen' break the seal, liquid isdrawn off from the first trough A, by the tap a, or the like. Liquid isintroduced into the said trough A to remake the seal. 7

Instead of the said ring B, or the like, being made buoyant by means ofan airspace, as described, it may be raised and lowered by mechanicalmeans.

An example of how this may be done is shown in Fig. 2, where the portswhich correspond with those shown in Fig. 1 are marked with the samereference letters. 7

The ring B has cords, or chains, d, attached to it at b (at any requirednumber of places), the said cords or chains, passing over pulleys 6(carried by brackets from any suitable supports) and carrying at theirother ends counterweights d which will keep the ring B elevated whenliquid is in the trough A, and allow the ring B, to descend when liquidis withdrawn from the said trough.

What I claim is 1. A liquid seal comprising a sealing member, a fixedtrough beneath the same, and an intermediate sealing trough arranged inthe fixed trough and into which the fixed sealing member dips, saidintermediate trough belng L vertically movable to make or break sealwith the fixed sealing member.

2. A liquid seal comprising a seallng inemher, a fixed trough beneaththesame, and

an intermediate sealingtrough sustained, at least in part, by the liquidin the fixed trough and rising orfalling with a variation in the breakseal with the sealing member.

3. In a liquid seal, a sustaining trough, a sealing trough supported, atleast in part, by the liquid in thesustaining trough and rising orfalling with a variation in the liquid level in the sustaining trough,for the purpose specified. V

4. In a liquid seal, a sustaining trough liquid level in the fixedtrough to make or and a sealing trough floating therein and verticallyalined pipes, a sealing flange pro jecting downward from the upper pipe,a In testimony whereof I have signed my trough earned by the lower p1pe,and an 111- neme to tlus speclfieetlon 111 the presence of 10 terp'osedsealmg trough lnto Wlnch the 'sealtwo subscrlbmg mtnesses. i11 flen'edips 'said 'sealin' troli 'h l'isin FRE'DER KE H. 01' fallmp; Wlth a,vzu'latlon 1n the llquld level Q G blHT 1n the trough earned by thelower p1pe and W1tnesses:

serving to nmke .01 break seal with the seal- G. F. TYSON, 111g flange,substzmtla-lly as descrlbed. LEONARD NVALTER.

0011198 01 this petent may be obtained for five cents each, byaddressing the Commissioner of Patents,

' Washington, 1). c. t V

